The allegations were that CPS didn't oppose the appeals, Starmer however overruled the advice.
Tbh, that's just minor compared to the rest of the points - Corbynistas aren't going to be happy one bit and that's his biggest problem right now, a divided party.
At this point in time, I don't see Labour making gains for quite a while. It's all up in the air whilst covid019 and Brexit are around; key battles and leaders will be those after Johnson and Starmer.